Coding⏱️ 3 min read📅 2026-06-19

How to Fix: Why does Internet Explorer throw an "Object Expected" error?

IE throws an Object Expected error due to incorrect usage of PHP variables in JavaScript.

Quick Answer: Use JavaScript variables instead of PHP variables, and ensure correct syntax for conditional statements.

Internet Explorer throws an 'Object Expected' error when opening a client front-end application, specifically when trying to submit a login form. This issue affects users who rely on Internet Explorer for their daily browsing needs.

The 'Object Expected' error can be frustrating and may lead to a loss of productivity. In this guide, we will walk you through the root causes of this error and provide two primary fix methods to resolve the issue.

🛑 Root Causes of the Error

  • The primary reason for the 'Object Expected' error in Internet Explorer is due to the incorrect usage of JavaScript events. The code attempts to bind a submit event to an element using the `bind()` method, which is not supported in Internet Explorer. Additionally, the use of PHP variables (`$_GET['email']` and `$_GET['password']`) within the JavaScript code can also lead to issues.
  • Another possible reason for this error is due to the incorrect handling of asynchronous requests. The `processLogin()` function is called when the form is submitted, but it may not have completed its execution before the form submission is processed, leading to an 'Object Expected' error.

🚀 How to Resolve This Issue

Using a JavaScript Alternative for Submit Event

  1. Step 1: Replace the `bind()` method with the `addEventListener()` method to attach the submit event handler to the element. This will ensure compatibility with Internet Explorer.
  2. Step 2: Modify the code to use `addEventListener()` instead of `bind()`: `$(document).ready(function() { $('#login_form').on('submit', function() { processLogin(); return false; }); });`
  3. Step 3: Make sure to include the necessary polyfills or libraries that support the `addEventListener()` method in Internet Explorer, such as jQuery or a custom solution.

Using Server-Side Validation and Response

  1. Step 1: Implement server-side validation to ensure that the login credentials are correct before submitting them to the server. This will prevent the 'Object Expected' error by ensuring that the form data is validated before submission.
  2. Step 2: Use a server-side language like PHP, Python, or Node.js to create a backend API that handles the login form submissions. Ensure that the API validates the input data and returns a response indicating whether the credentials are valid or not.

💡 Conclusion

By following these two primary fix methods, you should be able to resolve the 'Object Expected' error in Internet Explorer when opening your client front-end application. Remember to test your application thoroughly after implementing any changes to ensure that it functions as expected.

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